The *one* nice thing about subversion branches is that they have a
life-cycle. You can create a branch, which can later be renamed (through
the normal svn copy-it-to-a-new-name-and-delete-the-old-one technique)
and when you're done with it it can be deleted.
However the project policy stuff works out I certainly hope that a
similar branch life-cycle will be possible. I actually wonder if this is
where we should be starting with the policy stuff, since it's a feature
that everyone seems to want, myself included. i.e. suppose we build in
some sort of support for branch life-cycle support and punt on the
permissions stuff for a while, if that's even possible.